Setting device for sawmill carriages



June 15 1926. 1,589,283

C. T. WYNNS SETTING DEVICE FOR SAWMILL CARRIAGES Filed Oct. l. 1924 4 Sheets-Sheet 1 ATTORNEY June 15 ,1926.

T. WYNNS SETTING DEV ICE FOR SAWMILL CARRIAGES Filed Oct. 1,. 1924 4 Shgets-Sheet 2 V 514 ww fi \v g W \d .Nh .MH W n N. 7 Nu mun [Wu 0% 4 1 W yfl aifig E:: 25% I a w w kw f" r NN II .k W O F r RN! W NM. Q a Q; H g l 14. o v i Q .5 L I 1 WW gg NW \N QM. Mm Nmmm m u v m vm mu PLH I v 1 .H.

ATTORNEY June 15 1926; 1,589,283

C. T. WYNNS SETTING DEVICE FOR SAWMILL CARRIAGES Filed Oct. 1, 1924 4 Sheets-Sheet 5 INVENTOR A'ITORNEY June 15,1926; 1,589,283

C. T. WYN NS SETTING DEVICE FOR SAWMILL CRRIAGES Filed Oct. 1, I924 4 Sheets-Sheet 4 Cjlusl'ijrms INVENTOR ATTORNEY Patented June 15 1926 CYRUST; wYNNs, F ROCKY Momyn- Noemi CAROLINA.

SETTING nnvicn FOR SVAQ'WYMILIL CARBIAGES.

Application flied 6mm 1, i954. serial in. 741,075

This invention relates to sawmill inachinery, and has forit object the provision of a novel automatic mechanism assoc ated with the reciproicat'ory 10g carriage whereby to advance the knees thereof, at ezich stroke of the carriage whereby the log" will he moved step by step permitting the sewing of the successive plzinks'l or'hozirds.

Most devices for this purpose involve a ratchet mechanism mounted on the cat-fridge controlled by an operator riding upon the carriage, the o sra er being, in some instances, strapped down on accoun't of the rapid movement of the'cztrriegel Ob'vi0i1sly, tliewell known type'thu's requires the services of an atlditionzil zittendant 'for controlling the feeding of the log to the saw.

It is with the above facts in view thalt I have designed the present mechanism which may be constructed as an attachment to 2ilready existing; sa w niillcerriages, the device being so arranged that after being set the feeding will be ecconipl'ished automatically and without the services" of an additional attendant, thereby reducing labor and consequently the cost of production.

Another object is't'he' provisibh of an auton'mtie mechanism which may be initizilly set for advancing a log toziny desired extent whereby planks or boards of difi'erent thicknesses may be'cut. I

Yet anotherobject i's the provision of manually settzible" a 'ncl a utonizit'i czilly opeiable" means for receding the kneses" for instance, when it is desiredjtb reduce the thickness of'the cutting as deteri'nine'd by a previous setting of theautointitic advancing mechanism.

The invention general improvement in man structural deta'ilswhereby" toinsure durability in service and efficiency in operation.

furth'ei contemplates the I VVith the above and other objects and ad vantages in" view, the invention consists in the details of construct-ion and '2irian'geinent to be hereinafter more fully described end claimed, and illustrated in the accompanyin g drawings, in whichi "Figure- 1 is a 'la-n view of the devide; FigureQ is a"sideelev1ti0n;

FigureB is ztse'ctioh on the line of c.

Figure 451st cibssectidn-oxithe lineH of Fig. 1, K

of devices'of this class Figure is it section on the line 5 5 of Fig. 1",21 nd p I v Figure 6 is a plan viewof 2i modified form. 1 Referring Inor' pz irticul arly to the drawings, the letter A designates a sawmill cerriage equipped with wheels B trz ivelling on I t'r'zicks C. This cerrizige is of course n oved by any suitableor preferred means such :is those well known in the a rt but means is not illustrated as it forms no part of the present inv'ention'.

The carriage A is provided with transversely extending head blocks 10 within wl'i'ich ere'sli'dabl'y mounted knees 11 wl1ich support and which are adapted to niove'the *log oii the'cerriage for e'dvancing the se ne and consequently efi'ecting feeding" to the saw as successive planks or boards are out. On the undersides' of the knees are racks 12 with which inesh pinions 13' carried by a shaft" 145 jouriiale'd zit one side of the carriage. Obviously, when the shaft 145 is rotated the knees will correspondingly 1n0ved,. the extent depending upon thenuinher of revolutions given to the shaft. The shaft 14 carries a bevel'gar 15 which meshes with e bevel ear'le on theshefft 17 whicli'extends transversely of the carriage and which constitutes the drive shaft.

Rigidly secured on'the she'ft17- is a pinion 18 and iotat'ahle on thes h'zift is a bevel gear 20- meshing; with the bevel gear 15. The

sheftiis eq ipped with it friction disk 21 v for a purpose to be describe'dmA bearing bracket 19 is provided for properly supporting theshaft. I p I p h I Pro 'ecting from one side of the" cairiege are supports 22 and E23 which'mey beLb-ars onthe like; and these support-s carry brackets 2411 5011 which are pivoted at 26 upstanding links 27 which have their' upperjends 28 forkedand pivotally connected at 29' with hezi-Ifings- 30 which support at shaft 31o'n 'whzi'cvh'is secured a dru1n32' which is polygonal in cross section and which is' here representedas hexagonal, The various feces of this drurri carry or are formed as'rack bars "It will beohserved that these bars are of different lengths 011211 the' different faces and the drum is rotatable whereby to bring 'aiiy desire'd rzick bar into cooperative relation with the pinion 18, depending upon the number (if turns whichlit is desired to give the-pinions 13 which move the knees. At

one end the shaft 31 is squared at 34 for engagement thereon of a suitable crank handle or wrench, such as that indicated at 35, whereby the drum may be turned to bring any desired rack bar into engagement with the pinion 18. The bracket 24 is formed with a rigid projection 36 which extends upwardly and which serves as an abutment for the adjacent link 27 for limiting n1ovement of the link in one direction under the influence of a spring 37 which has one end connected with a rod 38 in turn connected with the projection 36. Obviously, the drum 32 may swing downwardly out of engagement with the pinion 18 upon the return stroke of the carriage, the spring 37 operating to return the drum to its normal or elevated position after such return stroke is completed.

Mounted at one side of the carriage most remote from the mechanism above described, is a support '9 carrying a dial 10 inscribed with numerals which may have any arbitrary meaning such as inches or any desired fractions thereof, and indicating the thickness of planks or boards to be cut. Rotatably mounted at the center of the dial is a shaft 41 carrying a pointer 42 movable over the dial and carrying a sprocket 43 about which is trained a chain 4 1. On the shaft 31 is a sprocket 15 about which is trained a chain 46. The ends of the chains 14 and 16 are connected by flexible members 17 which are trained under suitably grooved guide pulleys 48. Movement of the shaft 81, and consequently the drum 32, by means of the crank 35 will result in corresponding movement of the pointer 42 and as this pointer cooperates with the indications on the dial a visible reading will be had as to the thickness of the planks or boards to be or being cut.

Instead of turning the crank, the operator may move the pointer over the dial into registration with the desired graduation so as to set the mechanism.

On the supports 22 and 23 are other brackets 49 and 50 upon which are pivoted links 51 which are in turn pivot-ally connected at 52 with depending projections 53 on a track 54, whichis positioned beneath and adapted to engage the friction disk 21. Ordinarily, this track drops down, by gravity, into such position that it does not touch the friction disk. Journally mounted transversely of the carriage trackway is a rock shaft 54? to which one link 51 is rigidly secured. At the side of the carriage trackway most remote from the rack mechanism above described, the shaft 54 carries a pedal 55.

Journally. mounted in spaced parallel relation to the shaft 54: is a similar shaft 56 having one end equipped with a pedal 57 and having its other end carrying an to the above described bevel gear 15.

arm 58 which is pivotally connected'at 5!} with a link 60 in turn pivoted at 61 to thc adjacent link 27.

In the operation, assuming that the drum 32 has been turned to bring the desired rack bar 33 into position to engage the pinion 18 it will be seen that when the carriage A. is at the limit of its forward movement and starts rearwardly in the direction of the arrow, the pinion 18 will engage the rack bar 33 and be rotated, thereby turning the shaft 17 and consequently the shaft 1.4. As the shaft 14: carries the pinions 13 meshing with the racks 12 on the knees 11 it is ob vious that the latter will be moved for advancing the log. On the return stroke the pinion 18 rides idly over the rack bar 33 inasmuch as the drum 32 will be moved downwardly against the resistance of the spring 37.

whenever it is desired to recede the knees instead of advancing them, it is intended that the operator press upon the pedals 55 and 57 so as to rock the shafts 54 and 56 and move the track 54 upwardly, and the drum 32 downwardly, so that the track will engage the friction disk 21 while the rack drum disengages the pinion 18. It is evident that the disk will rotate so that the gear 20 meshing with the gear 15 will cause the shaft 17 and naturally the shaft le to be turned in the reverse direction from the movement imparted to them when the pinion 18 engages the rack bar.

In the modified form of the device shown in Figure 6, the main features of the con struction are identically the same as above described but instead of'a rack and pinion mechanism for moving the sawmill knees I make use of a screw device for the same purpose. In this form, the sawmill knees incheated by the numeral 62 are slidably mounted within suitable heads 68 and are formed with screw threaded bores 6st which act as nuts and within which engage screws 65 carrying beveled ears 66 and 67, the latter of which corresponds to the bevel gear 16 of the first described form. I also make use of a shaft '68 corresponding to the above described shaft 1d and driven in exactly the same manner. shaft 68 carries a beveled with the beveled gear 66 end it carries a bevel the bevel gear 67 and At one end, this gear 69 meshing and at its other gear 70 meshing with corresponding exactly In all other respects this modification is exactly the same as the first described form.

In the operation of this variation, it is observed that all the parts of the mechanism have the same action as above mentioned except that when the shaft 68 is rotated it will act to drive the bevel gears 66 and 67 and consequently turn the screws 65, which on account of being threaded into lat the bores 641 will act to move the knees forwardly or rearw'ardly, as the case may be.

From the foregoing description and a study of the drawings, it will be apparent that I have thus provided a very simple feed device which will be entirely automatic and which will avoid all necessity for having an extra operator riding on the carriage. The device consequently saves time, labor and money. 7

lVhile I have shown and described the preferred form of the invention it is to be understood that I reserve the right to make such changes in the construction and arrangement as will not departfrom the spirit of the invention or the scope of the subjoined claims.

Having thus described the invention, I

claim: 7

1. In combination with the reciprocatory carriage of a, sawmill, knees slidably rack and pinion mechasaid knees, a shaft conmechanism, a pinion on rotatably mounted at one side of the carriage trackway and rack bars on the drum adapted to-engage the pinion.

2. In combination with the reciprocatory carriage of a sawmill, knees slidably mounted thereon, rack and pinion mechanism for moving said knees, a shaft for driving the pinions, a pinion on the shaft. a drum rotatably mounted at one side of the carriage trackway, and rack bars on the drum adapted to engage the'last named pinion, the rack bars being of different lengths, and means for bringing a selected bar in position to engage the last named pinion. V

3. In combination with the reciprocatory carriage of a sawmill, knees slidably mounted thereon, means for moving said knees including a shaft, a pinion on said shaft, a drum rotatably mounted at one side mounted thereon, nism for moving nected with said the shaft, a drum porting the drum whereby to permit cepression thereof upon the return stroke of the'carriage. V f

5. In combination with the reciprocatory carriage of a sawmill, knees slidably mounted thereon, step by step means for moving the knees including a shaft, a pinion on said shaft, a drum rotatably mounted at one side of the carriage trackway, rack. bars on the drum adapted to selectively engage the pinion, means swingably supporting the drum, and pedal operated means connected with said means. for swinging the drum into inoperative position.

6. In combination with the reciprocatory carriage of a sawmill, knees slidably mounted thereon, means for moving the knees including a drive shaft, a pinion on said shaft, a drum rotatably mounted at one side of the carriage trackway, rack bars on the drum adapted to selectively engage the pinion, a friction disk on said shaft, a track adapted to be brought into engagement with the friction disk, and means for simultaneously moving the drum to disengage the pinion and move the track into engagement with the friction disk.

In testimony whereof I affix my signature.

' CYRUS T. WYNNS. 

